We just booked last night and now I'm completely bummed out. 15 months is too much time to wait.
Last time we booked our couples trip, it was six months in advance and I had a hard time focusing on ANYTHING as my mind would wander to Jamaica. That was our first trip and now that I know how wonderful it really is, my daydreams will be more vivid than before. I better be able to supress them every once in a while if I want to keep my job!